im having serious lean problem according too my a/f gauge .digging all over for answers.just checked plugs too see what there telling me .like it says is yellow rich or lean? thanks.
im having serious lean problem according too my a/f gauge .digging all over for answers.just checked plugs too see what there telling me .like it says is yellow rich or lean? thanks.
mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .
Are Ya Kidding Me ,no Quick Answers?
mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .
Spark Plug Analysis
See if this helps
Thanks But I Guess Im Running Good From What I Can Tell Plugs Are Very Clean And No Deposits Only Beeni N 200 Mls.my Others Before L/ts Were Nice Light Brown .iwas Ruunning Alittle Rich .this Problem Never Happened Before The L/t Install.
mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .
The tip of the insulator's color indicates only if you are using the correct heat range. You need to look way down inside the plug at the junction between the insulator and the body of the plug. How far up the insulator the carbon ring extends indicates how rich it is. And if you are checking full throttle mixture, the only accurate way is to put in new plugs, do a WOT pull, and before you let off the gas, kill the ignition. Then pull off the road and pull your plugs and look at them. Otherwise, if you do a pull, then cruise, then idle, then shut it off, what you will be looking at is the idle mixture.
foggy's "spark plug analysis" even states right at the top that it is a heat range analysis.
I'm not sure that going purely by color for heat range analysis is accurate with today's fuel.
But as far as mixture goes, what I described still holds true. Haven't you ever wondered what those mechanics at the track were looking at with their lighted magnifying glasses in the spark plugs?
2000 Sierra 2500 HD. 408 (11-2007) Whipplecharged, Big (18x24x4) FMIC.
From your scans today it's running ok, I think the wb is band.
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